Terrain Editor 2003-12-02 - By John Richardson
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Hello,
>John and Harvey,
>
>Terrain grids exported by Carrara, even via Amapi, are likely to
>make VRML files very, very large. And VRML files are rather bloated,
>anyway. Viewpoint technology, now applied to Atmosphere, is more
>efficient overall than VRML, but not with hires grids.
Perhaps Eovia should support the GeoVRML addendum.
Now, that is not going to happen. So I suppose that one idea would be
to import into AxelEdge and see if that authoring tool will optimize
the grid.
However, VET and Shockwave3D and OpenInventor are all acceptable.
>
>Bryce has an adaptive exporter that creates a triangular tesselation
>from a grid landscape, at a user-specified resolution (much lower
>than the grid resolution). You can imitate that by exporting a
>Carrara terrain grid to Amapi and decimating it. A6 decimation will
>give you a uniform tesselation and A7 decimation will give you a
>weighted decimation. Anything Grooves will give you a weighted grid
>when you use the adaptive setting--big rectangles covering low
>detail and little squares for the fine detail.
>
>I've done a lot of terrain conversion, and decided as a result of my
>research that the best method has yet to be developed. A weighted
>tesselation would be good if it recast the mesh instead of trying to
>preserve the original grid structure in the detailed areas. A
>handmade landscape, created like any other polygon mesh, would be
>even better, except that this is hard to do and very hard to make
>with accuracy. For example, the cliff face of Half Dome or El
>Capitan could be reasonably approximated with relatively few
>polygons if handmade. A grid of these features, by contrast,
>stretches a high poly count vertically without showing much vertical
>detail. But good luck trying to recreate the details accurately in a
>handmade model of Yosemite Valley.
>
>I think this is an important issue for anyone who wants to post
>landscapes using a web 3D technology. It hasn't really been
>addressed optimially.
>
>SMcQ
>
True. On top of that, those that are persuing GeoVRML tend to persue
it from the GIS perspective. So what's and artist on a budget to do?
Suffer, most likely......
John F. Richardson
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